<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title>pseudo double SetInitialChildlist</title>
  <style>
   .cat::-moz-table-row-group { overflow: scroll;}
   tr { position: absolute;}
  </style>
 </head>

 <body>

  <div class="cat" style="display:table">
   <div style="display:block">
    <div style="display:table-cell">Cell</div>
   </div>
  </div>

 </body>
</html>
